Pilot operated hydraulic control valve

Details Pilot operated hydraulic control valve Pilot operated hydraulic control valve

1988-01-19

1989-01-24

Rivell, John

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 38, 251 50, 251 36, F16K 3140

Patent

active

047996455

ABSTRACT:
A pilot operated control valve includes a spool type pilot valve member which is coupled to the main valve member by a pair of springs so that both pilot pressure forces and spring forces act on the main valve member. The main valve member and the housing in which it moves enclose a damping chamber. A damping orifice extends through the main valve member and connects the damping chamber with a pilot pressure chamber to reduce vibration of the main valve member.

REFERENCES:
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patent: 4494726 (1985-01-01), Kumar et al.
patent: 4526340 (1985-07-01), Kolchinsky et al.
patent: 4679765 (1987-07-01), Kramer et al.
patent: 4699351 (1987-10-01), Wells

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